L-R:Mitch Grassi, Scott Hoying, Avi Kaplan, Kirstie Maldonado and Kevin Olusola, known as Pentatonix, winners of Best arrangement, Instrumental or A Capella, for their A Cappella medley of classic Daft Punk songs, pose in the press room at the 57th annual Grammy Awards in Los Angeles, California on February 8, 2015. AFP PHOTO/FREDERIC J. BROWN (Photo credit should read FREDERIC J. BROWN/AFP/Getty Images)
